Solvent Red 24 Chemical Properties

Melting point:

199 °C (dec.)(lit.)

Boiling point:

260°C

Density 

1.1946 (rough estimate)

vapor pressure 

0Pa at 25℃

refractive index 

1.6000 (estimate)

storage temp. 

Flammables area

solubility 

Insoluble in water; soluble in benzene, methanol, acetone, isopropanol; slightly soluble in ethanol

form 

Powder/Solid

Colour Index 

26105

pka

13.52±0.50(Predicted)

color 

Red Brown

Water Solubility 

23μg/L at 25℃

λmax

520 nm, 357 nm

Merck 

14,8393

BRN 

709018

Stability:

Stable. Incompatible with strong oxidizing agents.

Biological Applications

Detecting atherosclerosis; diapers; skin care products; shampoos; hair colors; stents; dental impression materials

InChIKey

RCTGMCJBQGBLKT-PAMTUDGESA-N

LogP

6.66

IARC

3 (Vol. 8, Sup 7) 1987

NIST Chemistry Reference

O-tolylazo-o-tolylazo-beta-naphthol(85-83-6)

EPA Substance Registry System

C.I. Solvent Red 24 (85-83-6)

Safety Information

Hazard Codes 

Xi,T

Risk Statements 

36/38-45

Safety Statements 

26-36-53-45

WGK Germany 

3

RTECS 

QL5775000

TSCA 

Yes

HazardClass 

IRRITANT

HS Code 

32129000

MSDS

• Language:English Provider:C.I. 26105
• Language:English Provider:ACROS
• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

Solvent Red 24 Usage And Synthesis

Chemical Properties

dark red to brown crystals or powder

Uses

Fat stain.

Uses

It has been used to promote wound healing. Biological stain. Dyes and metabolites, Environmental Testing.

Uses

Solvent Red 24 has been used to promote wound healing and biological stain.

Preparation

2-Methyl-4-(o-tolyldiazenyl)benzenamine diazotization, and Naphthalen-2-ol coupling.

Definition

ChEBI: A bis(azo) compound that is 2-naphthol substituted at position 1 by a {2-methyl-4-[(2-methylphenyl)diazenyl]phenyl}diazenyl group. A fat-soluble dye predominantly used for demonstrating triglycerides in frozen sections, but which may also stain some protei bound lipids in paraffin sections.

General Description

Sudan IV is a hydrophobic azo dye. It stains triglycerides and imparts an intense red color. The dye does not stain lipid droplets or phospholipids.

Flammability and Explosibility

Not classified

Safety Profile

Questionable carcinogen with experimental tumorigenic data. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx.

Properties and Applications

red to blue light red. Red powder, resistance to 5% of hydrochloric acid and sodium carbonate solution. Insoluble in water, soluble in ethanol and acetone, soluble in benzene. In concentrated sulfuric acid to blue light green, dilution have red precipitation. Mainly used in acetate fiber, organic glass, ABS resin, rigid polyvinyl chloride (PVC) and so on the many kinds of plastic coloring, and can also be used to paint and ballpoint ink color, also can be used for polyester fiber colouring.

Standard	Light Fastness	Heat-resistant(℃)		water	Sodium Carbonate(5%)	Hydrochloric acid(5%)
		Melting point	Stable
ISO	Good	184-185	120	Insoluble	No change	No change

Purification Methods

Crystallise the dye from EtOH/water or acetone/water. [Beilstein 16 IV 249.]

Solvent Red 24 (85-83-6)Related Product Information

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